[pom] Update formatter-maven-plugin to 2.7.3
[pom] Update formatter-maven-plugin to 2.7.3

dblock/waffle,Waffle/waffle,Waffle/waffle,dblock/waffle,hazendaz/waffle,hazendaz/waffle,Waffle/waffle,dblock/waffle,dblock/waffle,hazendaz/waffle